Illustrated Glossary of Organic Chemistry

Butane: An unbranched alkane of molecular formula C4H10. Butane also refers collectively to the two C4H10 isomers: butane (also called n-butane) and methylpropane (also called isobutane).

Molecular Structure of n-Butane







Lewis structure
  
Ball and spoke
  
Space-filling model
  
Molecular model kit

Methylpropane (isobutane)